// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "select_file_dialog_android.h"

#include "base/android/jni_android.h"
#include "base/android/jni_array.h"
#include "base/android/jni_string.h"
#include "base/android/scoped_java_ref.h"
#include "base/logging.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "jni/SelectFileDialog_jni.h"
#include "ui/android/window_android.h"
#include "ui/shell_dialogs/selected_file_info.h"

using base::android::ConvertJavaStringToUTF8;

namespace ui {

// static
SelectFileDialogImpl* SelectFileDialogImpl::Create(Listener* listener,
    SelectFilePolicy* policy)
{
    return new SelectFileDialogImpl(listener, policy);
}

void SelectFileDialogImpl::OnFileSelected(
    JNIEnv* env,
    const JavaParamRef<jobject>& java_object,
    const JavaParamRef<jstring>& filepath,
    const JavaParamRef<jstring>& display_name)
{
    if (!listener_)
        return;

    std::string path = ConvertJavaStringToUTF8(env, filepath);
    std::string file_name = ConvertJavaStringToUTF8(env, display_name);
    base::FilePath file_path = base::FilePath(path);
    ui::SelectedFileInfo file_info;
    file_info.file_path = file_path;
    file_info.local_path = file_path;
    if (!file_name.empty())
        file_info.display_name = file_name;

    listener_->FileSelectedWithExtraInfo(file_info, 0, NULL);
}

void SelectFileDialogImpl::OnMultipleFilesSelected(
    JNIEnv* env,
    const JavaParamRef<jobject>& java_object,
    const JavaParamRef<jobjectArray>& filepaths,
    const JavaParamRef<jobjectArray>& display_names)
{
    if (!listener_)
        return;

    std::vector<ui::SelectedFileInfo> selected_files;

    jsize length = env->GetArrayLength(filepaths);
    DCHECK(length == env->GetArrayLength(display_names));
    for (int i = 0; i < length; ++i) {
        std::string path = ConvertJavaStringToUTF8(
            env, static_cast<jstring>(env->GetObjectArrayElement(filepaths, i)));
        std::string display_name = ConvertJavaStringToUTF8(
            env,
            static_cast<jstring>(env->GetObjectArrayElement(display_names, i)));

        base::FilePath file_path = base::FilePath(path);

        ui::SelectedFileInfo file_info;
        file_info.file_path = file_path;
        file_info.local_path = file_path;
        file_info.display_name = display_name;

        selected_files.push_back(file_info);
    }

    listener_->MultiFilesSelectedWithExtraInfo(selected_files, NULL);
}

void SelectFileDialogImpl::OnFileNotSelected(
    JNIEnv* env,
    const JavaParamRef<jobject>& java_object)
{
    if (listener_)
        listener_->FileSelectionCanceled(NULL);
}

bool SelectFileDialogImpl::IsRunning(gfx::NativeWindow) const
{
    return listener_;
}

void SelectFileDialogImpl::ListenerDestroyed()
{
    listener_ = NULL;
}

void SelectFileDialogImpl::SelectFileImpl(
    SelectFileDialog::Type type,
    const base::string16& title,
    const base::FilePath& default_path,
    const SelectFileDialog::FileTypeInfo* file_types,
    int file_type_index,
    const std::string& default_extension,
    gfx::NativeWindow owning_window,
    void* params)
{
    JNIEnv* env = base::android::AttachCurrentThread();

    // The first element in the pair is a list of accepted types, the second
    // indicates whether the device's capture capabilities should be used.
    typedef std::pair<std::vector<base::string16>, bool> AcceptTypes;
    AcceptTypes accept_types = std::make_pair(std::vector<base::string16>(),
        false);

    if (params)
        accept_types = *(reinterpret_cast<AcceptTypes*>(params));

    ScopedJavaLocalRef<jobjectArray> accept_types_java = base::android::ToJavaArrayOfStrings(env, accept_types.first);

    bool accept_multiple_files = SelectFileDialog::SELECT_OPEN_MULTI_FILE == type;

    Java_SelectFileDialog_selectFile(env, java_object_.obj(),
        accept_types_java.obj(),
        accept_types.second,
        accept_multiple_files,
        owning_window->GetJavaObject().obj());
}

bool SelectFileDialogImpl::RegisterSelectFileDialog(JNIEnv* env)
{
    return RegisterNativesImpl(env);
}

SelectFileDialogImpl::~SelectFileDialogImpl()
{
}

SelectFileDialogImpl::SelectFileDialogImpl(Listener* listener,
    SelectFilePolicy* policy)
    : SelectFileDialog(listener, policy)
{
    JNIEnv* env = base::android::AttachCurrentThread();
    java_object_.Reset(
        Java_SelectFileDialog_create(env, reinterpret_cast<intptr_t>(this)));
}

bool SelectFileDialogImpl::HasMultipleFileTypeChoicesImpl()
{
    NOTIMPLEMENTED();
    return false;
}

SelectFileDialog* CreateAndroidSelectFileDialog(
    SelectFileDialog::Listener* listener,
    SelectFilePolicy* policy)
{
    return SelectFileDialogImpl::Create(listener, policy);
}

} // namespace ui
